Crotyl alcohol
Structural formula | ||||||||||||||||
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Structural formula of ( E ) -crotyl alcohol | ||||||||||||||||
General | ||||||||||||||||
Surname | Crotyl alcohol | |||||||||||||||
other names |
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Molecular formula | C 4 H 8 O | |||||||||||||||
Brief description |
colorless liquid with an unpleasant odor |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 72.11 g mol −1 | |||||||||||||||
Physical state |
liquid |
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density |
0.85 g cm −3 |
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Melting point |
<−30 ° C |
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boiling point |
114 ° C |
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Vapor pressure |
105 hPa (50 ° C) |
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solubility |
166 g l −1 (20 ° C) |
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Refractive index |
1.427 (20 ° C) |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C |
Crotyl alcohol (according to IUPAC - nomenclature 2-butenol ) is an unsaturated alcohol with a carbon-carbon double bond.
Isomers
Usually, crotyl alcohol is understood to mean the isomer with a trans -configured double bond. The cis compound is of little importance.
Isomers of crotyl alcohol | ||
Surname | ( E ) -2-butene-1-ol | ( Z ) -2-butene-1-ol |
other names | trans -2-butenol | cis -2-butenol |
Structural formula | ![]() |
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CAS number | 504-61-0 | 4088-60-2 |
6117-91-5 (unspec.) | ||
EC number | 207-996-8 | - |
228-086-7 (unspec.) | ||
ECHA info card | 100.007.270 | - |
100.025.533 (unspec.) | ||
PubChem | 637922 | 643789 |
20024 (unspec.) | ||
Wikidata | Q63395546 | Q27292395 |
Q420212 (unspec.) |
presentation
The presentation is made by reduction of crotonaldehyde .
properties
The compound is a colorless liquid with an unpleasant odor.
By reacting crotyl alcohol with phosphorus trichloride in the presence of pyridine , 1-chloro-2-butene can be obtained.
Individual evidence
- ↑ a b c d e f g h Entry on crotyl alcohol in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
- ↑ Data sheet Crotyl alcohol, mixture of cis and trans from Sigma-Aldrich , accessed on June 2, 2011 ( PDF ).
- ^ Association of authors: Organikum , 19th edition, Johann Ambrosius Barth, Leipzig · Berlin · Heidelberg 1993, ISBN 3-335-00343-8 , p. 506.
- ^ William G. Young, Walter H. Hartung, Frank S. Crossley: "Reduction of Aldehydes with Aluminum Isopropoxide", in: J. Am. Chem. Soc. , 1936 , 58 (1), pp. 100-102 ( doi : 10.1021 / ja01292a033 ).
- ^ Lewis F. Hatch, Stuart S. Nesbitt: Allylic Chlorides. IX. Preparation of cis and trans Crotyl Chloride. In: Journal of the American Chemical Society . 72, 1950, p. 727, doi : 10.1021 / ja01158a021 .